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Home > Products > Sensors, Transducers > Magnetic Sensors > Switches (Solid State)

Diodes Incorporated AH1807-P-A

Name: AH1807-P-A
Brand: Diodes Incorporated
SKU: AH1807-P-A
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AH1807-P-A

Manufacturer:: Diodes Incorporated

Category:: Switches (Solid State)

Package:: 3-SIP, Formed Leads

Datasheet:: AH1807-P-A.pdf

Description:: MAGNETIC SWITCH OMNIPOLAR 3SIP

Quantity:: RFQ Add To RFQ list

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Inventory:3,922

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Product details

Overview

AH1807-P-A from Diodes Incorporated is a medium-sensitivity, micropower omnipolar Hall-effect switch IC in SIP-3L package. It operates from 2.5V to 5.5V, consumes only 8–16 µA average supply current at 3V, and switches its open-drain output on with either North or South magnetic pole - enabling tamper detection in smart electricity meters.

For engineers reviewing the AH1807-P-A datasheet, AH1807-P-A pinout, AH1807-P-A application, or AH1807-P-A equivalent, this device is selected for ultra-low-power, high-temperature industrial sensing where magnetic polarity independence and chopper-stabilized thermal stability are required.

Technical Context

The AH1807 uses dual Hall plates and chopper stabilization to cancel offset drift, achieving ±15 Gauss operate point tolerance over −40°C to +125°C and <15 mV output on-voltage at 1 mA sink. Its sleep/awake architecture delivers 5–28 µA sleep current and 125 µs wake time.

Magnetic switching thresholds are bipolar and symmetric: B_op = ±60–115 Gauss, B_rp = ±40–100 Gauss, with 5–20 Gauss hysteresis. The single open-drain output requires external pull-up and supports up to 2.5 mA sink current.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	2.5V to 5.5V - enables direct use with Li-ion, 3.3V, and 5V rails without regulation
Average Supply Current	8–40 µA - ensures multi-year battery life in meter tamper detection
Output Type	Open-drain - allows flexible voltage-level interfacing and wired-OR configuration
Operate Point (B_op)	±60–115 Gauss - supports reliable actuation with low-strength magnets at distance
Temperature Range	−40°C to +125°C - qualified for outdoor smart meter and industrial enclosure environments
Hysteresis (B_hy)	5–20 Gauss - prevents chatter near threshold in noisy mechanical systems
ESD Rating	6 kV HBM - withstands handling and field electrostatic discharge without protection circuitry

Pinout & Package

Package: SIP-3L - 3-pin single-inline package with straight leads, 4.1 mm body length, 3.0 mm width, and 2.54 mm lead pitch; RoHS-compliant, halogen-free, green-qualified.

Pin/Terminal	Circuit Role	Design Meaning
1	VDD	Positive supply input - must be decoupled with 10–100 nF capacitor for noise immunity
2	GND	Ground reference - shared return path for supply and output load
3	OUTPUT	Open-drain output - sinks up to 2.5 mA; requires external pull-up resistor (10–100 kΩ)

Key Features

Feature	Design Value
Omnipolar magnetic sensitivity	Detects both North and South poles - eliminates magnet orientation dependency in assembly
Chopper-stabilized architecture	Reduces temperature-induced offset drift to <±0.5 mV/°C - maintains stable B_op across full range
Micropower sleep mode	5–28 µA quiescent current - extends battery life in always-on meter tamper monitoring
High ESD immunity	6 kV HBM rating - survives factory handling and field installation without added protection
RF noise immunity	Validated against common industrial RF sources - avoids false triggers in electrically noisy meter cabinets

Applications

Smart Electricity Meter Tamper Detection

Industrial Door/Tray Position Sensing

Use Scenario: Detect unauthorized access to utility meter enclosures using a magnet-triggered reed-switch replacement.

IC Role / Device Role / Timing Role: Omnipolar Hall switch providing contactless, polarity-agnostic status signal to meter MCU.

Use Value: Eliminates mechanical wear and corrosion issues of reed switches while maintaining <100 µA system standby current.

Use Scenario: Monitor open/closed state of control cabinet doors or removable equipment trays in factory automation panels.

IC Role / Device Role / Timing Role: Low-power proximity sensor interfaced to PLC input with open-drain logic level translation.

Use Value: Enables IP65-rated sealed enclosures without external actuator alignment; operates reliably at 125°C ambient.

Home Appliance Lid Switch

Level Detection in Water/Gas Meters

Use Scenario: Confirm washing machine or dishwasher lid closure before cycle initiation.

IC Role / Device Role / Timing Role: Magnetic position switch driving microcontroller GPIO with debounced digital output.

Use Value: Supports battery-backed lid detection in cordless appliances; immune to vibration-induced chatter due to 10–20 Gauss hysteresis.

Use Scenario: Sense float magnet position in ultrasonic or mechanical water/gas meter flow chambers.

IC Role / Device Role / Timing Role: Contactless level indicator converting magnetic displacement into clean digital edge for pulse counting.

Use Value: Replaces optical sensors vulnerable to condensation and dust; operates continuously at 85°C inside meter housings.

Equivalent & Alternatives

The following parts are listed as comparable options for similar omnipolar Hall-effect switch applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ALLEGRO A3212LLHLT-T	Higher sensitivity (B_op = ±25 Gauss), 5V-only supply, SOT-23 package	Better for weak-field or short-gap sensing; not rated for >85°C continuous operation	Select when magnet gap is <2 mm and ambient stays below 85°C; avoid for smart meter outdoor deployment
MELEXIS US5881LUA-ABA-000-RE	Lower power (3 µA avg), but narrower V_DD range (2.7–5.5V); SIP-3L compatible	Superior battery life in coin-cell devices; slightly reduced ESD (4 kV HBM) and no 125°C rating	Prefer for portable handheld meters; verify ESD robustness if installed in high-static environments

Compared with A3212LLHLT-T and US5881LUA-ABA-000-RE, AH1807-P-A uniquely balances 125°C operation, 6 kV ESD, and SIP-3L compatibility - making it the only choice for long-lifecycle, high-temperature, and high-reliability smart meter tamper detection.

Availability

AH1807-P-A is available at Aetrix Electronics and suitable for smart meter tamper detection, industrial door position monitoring, and home appliance lid sensing requiring stable component supply across extended product lifecycles.

Supply support for AH1807-P-A includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Diodes Incorporated is a global semiconductor company specializing in discrete, analog, and mixed-signal solutions for industrial, computing, consumer, and communications markets.

The AH1807 belongs to Diodes' Hall-effect sensor product line, engineered specifically for ultra-low-power, high-temperature, contactless switching in utility metering and industrial safety systems.

FAQ

What is the maximum recommended pull-up resistor value for the AH1807-P-A open-drain output?

The datasheet specifies a recommended pull-up range of 10 kΩ to 100 kΩ. At 100 kΩ, the output rise time remains under 1 µs with typical capacitive loading, preserving fast edge response for MCU interrupt inputs. Higher values increase susceptibility to noise and slow switching, especially in high-humidity or EMI-prone environments like meter cabinets.

Can AH1807-P-A operate reliably at 125°C junction temperature?

Yes - the device is fully specified and tested for continuous operation from −40°C to +125°C ambient, with thermal derating curves confirming 230 mW power dissipation capability at 25°C and linear reduction to zero at 150°C. No external heatsinking is required in SIP-3L mounting per standard JEDEC PCB footprints.

Does AH1807-P-A require an external bypass capacitor?

Yes - a 10 nF to 100 nF ceramic capacitor between VDD and GND is mandatory per the datasheet to stabilize supply during internal sampling cycles and suppress RF noise. Omission causes erratic switching, increased IDD(avg), and failure to meet specified hysteresis and operate point accuracy.

Is the SIP-3L package of AH1807-P-A compatible with automated pick-and-place assembly?

Yes - the SIP-3L variant (P-A suffix) uses straight leads with 2.54 mm pitch and conforms to IPC-7351B footprint standards. Land pattern dimensions match Diodes' AP02001 recommended pad layout, supporting 0.1 mm placement accuracy and standard reflow profiles including lead-free SAC305.

AH1807-P-A Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 3-SIP, Formed Leads

Packaging:: Cut Tape (CT)

Product Status:: Active

Function:: Omnipolar Switch

Technology:: Hall Effect

Polarization:: North Pole, South Pole

Sensing Range:: ±11.5mT Trip, ±10mT Release

Test Condition:: -40°C ~ 125°C

Voltage - Supply:: 2.5V ~ 5.5V

Current - Supply (Max):: 16µA

Current - Output (Max):: 2.5mA

Output Type:: Open Drain

Features:: -

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: 3-SIP

AH1807-P-A FAQ

1.How can I place an order for AH1807-P-A through Aetrix?

Please submit a Request for Quotation (RFQ) for AH1807-P-A on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for AH1807-P-A reliable?

The price and inventory of AH1807-P-A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AH1807-P-A is usually 5 days.

3.What payment methods are accepted for AH1807-P-A?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH1807-P-A transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AH1807-P-A?

AH1807-P-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AH1807-P-A order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for AH1807-P-A?

For technical support, including AH1807-P-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH1807-P-A requirements.

6.How does Aetrix verify that AH1807-P-A is sourced from the original manufacturer or authorized distributors?

All AH1807-P-A products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AH1807-P-A meets industry standards.

7.What is the process for return or replacement of AH1807-P-A?

All AH1807-P-A units undergo pre-shipment inspection (PSI). If there is an issue with AH1807-P-A, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The AH1807-P-A part is unused and in its original packaging.

Return procedure for AH1807-P-A:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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